Well yes if it's a repeated problem an amputation may be in order but I wouldn't call it an eventuality. It is good you were watching him and caught this. The next 2 or 3 weeks will be nerve wracking making sure he pees. Check back with us after he is home many of us have had this issue with our boy cats. I'd make sure you go home with him with a bladder relaxer and a pain reliever. He will need both because he is going to be afraid to pee becuase of pain and associating pain with peeing. My Cat is also anatomically small and he is 6 mos post and is ok but still on the bladder relaxer every other day mostly I think for my peace of mind.